The Freshwater Drum (Aplodinotus grunniens), distinct from saltwater drum species, is the only North American freshwater representative of its family. These robust fish can grow up to 3... The Freshwater Drum (Aplodinotus grunniens), distinct from saltwater drum species, is the only North American freshwater representative of its family. These robust fish can grow up to 36 inches in length and weigh over 30 pounds. They are found primarily in large rivers and lakes, preferring sandy or muddy bottoms. Freshwater Drums are known for their ability to produce a drumming sound and primarily feed on mollusks, small fish, and crustaceans. They use strong pharyngeal teeth to crush the shells of their prey.Click here to read more about Freshwater Drum.